Multiple mailing envelope



M. COVAN MULTIPLE MAILING ENVELOPE Nov. 23, 1954 3 Sheets-Sheet l FiledNov. 14, 1950 INVENTOR. M270 OVA/V M44, AIJ'OZPNLE'YJ NOV. 23, 1954 cov2,695,13U

MULTIPLE MAILING ENVELOPE Filed Nov. 14, 1950 3 Sheets-Sheet 5 INVENTOR.flafirwv 50m BY United States Patent MULTlPLE MAILING ENVELOPE MortonCovan, Hollywood, Calif.

Application November 14, 1950, Serial No. 195,558

2 Claims. (Cl. 229-73) My invention relates to improvements in envelopesand particularly to a device which permits the replacement of minorparts in conjunction with the envelope to make it mailable again andagain.

A. further object of. my invention is the provision of facilitiesv ofreply by the sender of the initial communication and consequent users.of the envelope. purpose a detachable section. or sections areincorporated in the structure of the envelope.

It is further the aim of this invention to provide the means ofeliminating the need of readdressing the envelope for any or all of itsmailing if it is forwarded back and forth between the same parties.

My invention also makes provisions for the conversion of the envelopefrom one class of mail to another for any particular mailing withoutafiecting the main structure of the envelope for future mailings.

Special emphasis has been placed by this invention on the ease and speedof the operation by the recipient of the envelope, both in its openingand resealing for reniailing. This is of particular importance wherelarge quantities of envelopes are used. for business purposes.

The structure of the envelope as outlined contains provisions for sevenmailings and two correspondence or advertising sheets. These areembodied in the initial body ofthe envelope. However, the facilities forcertain minor replacement, as stated, extend the usefulness of theenvelope for additional multiple mailings, especially if manufacturedfrom. a more durable material.

A further object of my invention is to provide an envelope which ispreferably stamped from a single blank For this i and the various partsare folded and then connected together in a novel manner to form thecompleted envelope.

A modified form of the invention includes a rotatable disc that has theaddressors and addressees' names and street addresses thereon. Therotatable disc'is so mounted that only one of the addresses will beexposed when the envelope iscompletely folded. Such an envelope can beused repeatedly so long as the material forming the envelope stands up.

A further object of my invention is to provide a device of the typedescribed which is extremely simple in construction and durable andeflicient for the purpose indicated.

Other objects and advantages will appear in the following specification,and the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompanying drawings forming a part'of this application, in which:

Figure l is an outside plan view of the envelope blank prior to thefolding of the various flaps into closed position;

Figure 2 is an inside plan view of the envelope blank prior to thefolding of the various flaps;

Figure 3 is: a section along the line lI'I'-III of Figure 1 and inreality is an end view of the: long lower flap in an unfolded position;

Figure 4 is a section along the line I.VIV' of Figure l and illustratesthe shortnflap with its pocket;

Figure 5 is an end view of the lower flap folded along itsmiddl'eportion with the gummed strip projecting beyond the fold;

Figure 6 is a face-view of Figure 5 when looking in the direction of thearrows.VlVI of Figure 5;

Figure? is asection along'the lineVl'IVII' ofFigure 2 and illustrates aportion of the long side flap with its 2,695,130 Patented Nov. 23,. 1954gummed edge and with its short flap that has an inturned portion forprotecting its gummed edge;

Figure 8 is a view similar to Figure 7 except that the gummed short flapshown in Figure 7 is unfolded and overlies the gummed edge: of the sideflap;

Figure 9 shows a plan view of. the envelope in folded position with thelong top flapdisposed on the outside. of the envelope;

Figure 10 is a. plan view of the foldedv envelope with the long lowerenvelope placed over the top flap and with the lower flap being foldedalong its mid portion so that the gummed strip on this flap will.adhere. to the adjacent portion of the topflap and the smaller portion'of the side: flap;

Figure ll is a plan view of the folded envelope with the long lowerflapin unfolded position and overlying the top flap;

Figure 12' is a view similar to Figure 11' with. the envelope merelybeing: rotated through an. arc of Figure 13" is aninside plan view ofthe envelope with the lower flap folded over the top flap and: theshortside flap overlying the. lower flap. The long side flap has been:severed;

Figure 14 is a view similar to- Figure l3 with the long side flap foldedover the short side flap rather thanbeing severed;

Figure 1-5 illustrates the long side flap, severed and reversed, so astobe fed throughasleeve of the short side fiap; the left hand edge ofthe severed flap has: its gummed edge and its gummed strip receiving thestub end of the longside flap and being secured thereto;

Figure 16 illustrates how the envelope can be folded sothat a: cornerwill be received in the pocket, thus permitting the envelope to beopened forinspection;

Figure l7 is a transverse sect-ion along the line XVil.XVll of Figure16;

Figure 18 shows a top: edge view of the long top flap provided with apluralityof detachable sheets;

Figure 19 isaplan view of the long top flapafter being severed alongitsperforated line sothat the severedportion can be used? as a postal card;

Figure" 20' is an end view of-v Figure 19 and illustrates the removal ofthe. outermost card from the pad;

Figure 21 isa plan view of the revolving label used with the envelope;

Figure 22 is a partial sectional view showing the attachment of thelabel tor thev envelope;

Figure 23 is a plan. view of the closed envelope with the label inposition;.

Figure 24 is aview similar to: Figure 23 and shows the label rotatedthrough an. arc of 180 degrees;

Figure 25' is a plan view of a pad of labels;

Figure 26 is a side elevation of Figure 25; and

Figure 27 is a modified. form of. the label where four positions can beused for names and. addresses rather than two.

While I have shown only the preferred forms of my invention, it should:be understood. that various changes or. modifications may be made withinthe scope. of the appended claimswithout departing from the spirit andscope of the invention.

In carrying out my invention, I provide an envelope blank of the shape.shown in- Figures 1 and 2. Figure lv illustrates the outside plarr viewofthe blank while Figure 2 illustrates the. inside plani view. The blankis composed of. a. center on main panel portion A with along top. flap.B that iscoextensive with; the. length of the main panel, see Figure. 2.Figure 1 shows. the long top flap B extending downwardly from the mainpanel because the figure shows the outside plan view ofthe envelope.The. long top. flap. B. is. adapted to befolded along the line. 1 so.as. to overlie. the. main panel A in a manner hereinafter described.Both. Figures 1 and- 2 illustrate the. long top flap as being providedwith an edge Zthat: isinclined. so as to cut olf a. corner indicated by:the dot: dashv line, 3 shown in Figure 2. The inner surface of. the.long. top flap. has acorner pocket 4, similar to the type: used: to:mountphotographs in: an. album,. the purpose of which. will be describedhereinafter. The

corner mount: 4 is. disposed on. the inner. surface of the topfiap B,see. Figure: 2..

It will also be noted from Figure 2 that the inner surface of the longtop flap B has an adhesive portion 5 disposed along an edge 6 of theflap. A line of perforations 6a border the gummed portion 5 to permittearing when opening the envelope. In addition to this, there is a lineof perforations 7, see Figure 1, which permit a portion of the long topflap to be torn along this line and be used as a postal card. Figure 1also shows a rectangular area 8 on the long top flap B for receiving apostage stamp when the flap is to be used as a postal card or when theflap remains a part of the complete envelope.

Both Figures 1 and 2 show the envelope provided with a long side flap Cand this flap is connected to the main panel A along a fold line 9. Thelong side flap is of a particular form in that it has a base portion C1disposed adjacent to the main panel and having a width substantiallyequal to the width of the main panel. The long side flap is thenprovided with an intermediate portion C2 of slightly less width than theportion C1 and a line of perforations 10 divides the portion C1 from theportion C2. It will be noted from both Figures 1 and 2 that the sides 11and 12 of the portion C2 are stepped inwardly a slight distance from thesides 13 and 14 of the base portion C1.

The greater length of the long side flap C is designated by the endportion C3 that is integral with the intermediate portion C2 and is of aslightly less width than this portion. The sides 15 and 16 of the endportion C3 are spaced inwardly from the sides 11 and 12 of theintermediate portion. This arrangement gives the flap C a wider base atits point of attachment to the main panel A. A corner pocket, not shown,could be provided at the end of the flap portion C3 in the same manneras the corner portion 4 for the flap B.

Figures 7 and 8 are a longitudinal section through a part of the endportion C3. The outer end of the portion C3 has a strip of adhesive 17on the inner surface. A line of perforations 18 is provided in theportion C3 and borders the inner edge of the adhesive portion 17. Itwill also be seen from Figures 2, 7 and 8 that the inner surface of theportion C3 is provided with a fiap D which may be stapled or otherwisesecured to the end portion C3 as indicated at 19 in Figure 7. Normallythe flap D is folded at 20 so as to dispose the free end of the flap ina position where it will not interfere with the adhesive strip 17. Incertain instances, which will be explained hereinafter, it is desirableto open the flap D along its fold line 20 so as to have its free endoverlie the adhesive strip 17. The surface 21 adjacent to the free endof the flap is provided with a strip of adhesive that will cooperatewith the strip of adhesive 17. When the section C3 and the flap D are inthe position shown in Figure 8, it is possible to insert a memberbetween the end of the section C and the end of the flap D and cause themember to be secured to the section C3 by merely pressing the adhesivestrip portions into contact with both surfaces of the member. Theadvantage of this feature will be explained hereinafter. The flap D hasa line of perforations 21a paralleling the fold line 20 and the flap Dmay be severed along this line. Figure 2 illustrates how the sections C2and C3 are provided with a. rectangular area 22 for receiving a postagestamp and thus permit the two sections to be removed from the basesection C1 along the line of perforations 10 and be used as a postalcard.

Referring again to Figure 2, it will be seen that I provide a long lowerflap E that is coextensive with the main panel A and is adapted to befolded over the main panel along a fold line 23. Therectangularly-shaped area of the long lower flap is substantiallycoextensive with the area of the main panel A. Figure 2 illustrates theinner surface of the long lower flap E, while Figure 1 shows the outersurface of the same flap. The flap E is provided with a median fold line24 that extends throughout the length of the flap, and divides the flapinto an inner portion E1 and an outer portion E2. Figure 3 illustrateshow a strip F is secured to the outer surface of the flap portion E1 soas to be positioned over the line of fold 24 and to proiect over theportion E2 a slight distance. The strip F is permanently secured to theportion E1 that lies between the fold lines 23 and 24 and has a line ofperforations 24a paralle ing the fold 24 and positioned adjacentthereto. Both Fi ures 3 and. 5 illustrate how the free end of the stripF normally line as clearly illustrated in Figures 5 and 6.

lies free of the outer portion E2 of the flap E and is provided withadhesive 25, see Figure 6. The gummed and perforated strip F is utilizedto seal the envelope in conjunction with the use of the top flap B forpostage indicia. In certain instances it is desirable to fold the outerportion E2 with respect to the inner portion E1 along the fold line 24and when this is done, the adhesive portion 25 of the strip F willextend beyond the fold In addition, the outer edge of the portion E2 ofthe flap E has a gummed strip 26 of adhesive, see Figures 2 and 3. Thelower flap E is brought into use for postage indicia by unfolding it atthe center crease 24. When this flap is not so used, the outer sectionE2 is kept out of the way by being folded at the crease 24.

Before describing the purpose of the specially constructed long lowerflap E, I will first describe the structure of a short side flap G. Theinner surface of this flap is shown in Figure 2, while the outer surfaceis illustrated in Figure 1. The outer edge 27 of the short side flap hasa gummed portion 28 provided on the inner surface of the fiap. A line ofperforations 29 extends along the inner edge of the gummed surface 28and parallels the outer edge 27. A band H is provided on the outersurface of the short flap G and covers most of its surface. The band H,see Figures 1 and 4, has a width equal to the width of the short sideflap G and has its edges secured to the edges of the flap G by staples31 or other suitable fastening means. Figure 1 shows the staples 31securing the edges of the band H to the flap G for about one-half of thelengths of the edges. The staples are placed so that the right-hand halfof the band H when looking at Figure 1, has its edges fastened downwhile the left-hand half has its edges unfastened. A pocket or sleeve isformed by the flap G and the band H, and this pocket has a wider portionwhere the edges are not stapled down for receiving the wider part C2 ofthe flap C when the flap is removed and inserted into the pocket asshown in Figure 15. The pocket has a narrow portion provided where thestaples 31 are used, for receiving the more narrow part C3 of the fiapC. In this way the detached fiap C can have its wider end C2 anchored tothe flap G when the latter is folded. The free end C2 of the flap isthen secured to the folded flap C1, by the adhesive portion 17. Themember H has a rectangular area 30 for receiving a postage stamp asindicated in Figure 1.

In Figures 9 to 17, inclusive, I show the various ways in which theenvelope may be folded for the purposes of mailing. In Figure 9 the longside flap C and the short side flap G have both been folded along theirfold lines 9 and 32, respectively, so as to be superimposed over themain panel A. The long lower flap E is shown overlying the side flaps Cand G and the figure also illustrates the outer portion E2 of the flap Eas being folded under the inner portion E1. The top flap B has thegummed portion 5 that is pressed down upon the adjacent portion of theflap E for sealing the envelope. All of the flaps B, C, E and G mayterminate in gummed strips and perforated lines that parallel the outeredges of the flaps.

The long top flap B extends over all of the other flaps and the inclinededge 2 exposes a sutficient portion of the inner flap area E1 so thatthe name of the addressee may be viewable at 33. It will also be seenfrom Figure 9 that the word To is stamped on the outer surface of theflap B near the edge 2 and an arrow 34 associated with the word pointstoward the addressees name 33 which appears on the flap portion E1. Astamp is placed on the rectangular area 8 and the name of the addressor35 is placed on the portion E1 and directly under the addressees name33. The outer surface of the flap B also has the word From printedthereon adjacent to the inclined edge 2 with an arrow 36 pointing towardthe addressors name 35.

Several flaps C, E and G, that are disposed under the flap B, togetherwith the main panel A have their superimposed corner portions which aredisposed adjacent to the pocket 4, actually inserted into the pocket forholding all of the parts of the folded envelope in proper relation toeach other without sealing the envelope. This permits postal inspectionand mailing the envelope second class. Figures 16 and 17 illustrate howthe various fiaps together with the main panel A have their corner p0r-.

ti'ons disposed in the corner pocket 4'. The gummed' strips. andperforated or wealened lines are,. of course; unnecessary when theflapis not-sealed, but instead the corner mount 4 is used ftarholdingtheenvelope flapsin folded" position.

In Figure the envelope isfolded to show howthe addressee can return theenvelope: to the one=from Whom he has received it. In this figure, theflap E is shown folded alon its median f'oldline 24* so the portion E2will not be viewable. The portion E1 is shown overlying the adjacentportion of'the long top flap B and the strip F is used for securingtheflap E tothe flap B; A new stamp may be-aifixed-totherectangular-area 8 of the-outersurface of the exposed partof the flap B.

It' will be seen also-from Figure 10' that the same two. names indicatedat' 33' and 35' are on: the portion El of the flap, but since theentireflap portion E1 is now exposed, the word From with itsarrow' 37formerly covered by the flap B, now pointstothe name 33, while the wordTo'withits arrow 38 points to the name and address indicated at: 35'; Inother words, the cut out corner 2 of the flap B may be used toeliminateth'e-need of readdressing the envelope for certain mailings. InFigure 9', the fully exposed topflap-B hasits word To associated with.the name-33-,. and: thezword: From associated with the name 35. Theaddressee can return the envelope to the addressor by folding the flapportion E1 over a partof the topflapB, as in- Figure 10. This will coverthe arrows 34 and- 36-withtheir words and expose the'arrows .37 and-38with their word's-From andTo.

Coming to Figure 1-1-, we have the envelope folded so that the entirelong lowerflap- E remains in an unfolded state and overlies the greaterportion of the flap-Br In this case the names of the addressee andaddressor and the arrows 37 and 38 will be viewable. The adhesiveportion 26. disposedalong the outer edge of the flap B will be pressed.down against the flap B for sealing the envelope. The flapE hasarectangular'area 39 forreceivinga postagestamp.

Figure. 12 is similar to Figure 11: and the envelope hasbeen-.rotated.180. while still lying in' the samepl'ane. The purpose ofthis is toshowthat: arectangular area 40 on the flap portion E1 may beused for receiving a postage stamp. In each of the instances: indicatedin Figures- 9 through 12, inclusive, the message may be written on theconcealed surfacesof the flaps-or a: message on a separate paper may becontained Within the envelope.

In Figure 13 the envelope is shown with the long side flap C torn alongits line of perforations 10 in order to free the integral portions C2and C3 from the base portion C1. In addition, the main portion of theenvelope illustrates the top flap B folded down over the main panel Aand then the long lower flap portion E1 is folded over the top fiap. Itwill be noted that the long lower flap has its outer portion E2 foldedunder its portion E1. Figure 13 further shows the short side flap Gfolded over the adjacent portions of the flaps B and E. Figure 13 isshown to illustrate how the long side flap C can be removed by tearingalong the line of perforations 10 and then this long side fiap can befed through the pocket or sleeve formed by the member H on the shortside flap G.

Figure 15 illustrates how the narrow end C3 of the severed side flap Cis fed through the cover-channel formed by the flap G and the band H,from the right hand side of the envelope and the same figure illustratesthe final position of the severed side flap C. This final position showsthe larger portion C2 received in the cover channel and the free end ofthe portion C3 secured to the folded base portion C1 by the adhesivestrip 17 on the inner surface of the portion C3 and the adhesive portionon the inner surface of the flap D. In other words, the base C1 isgripped between the two gummed portions just mentioned and this willseal the envelope for mailing purposes. The wide base C2 of the severedflap C will be retained in the cover channel H by the narrowing marginformed by the staples 31. The outer surface of the portion C3 has anaddressee name in the area indicated at 41 and the addressors name inthe area indicated at 42. The portion C3 also covers any used or yet tobe used surfaces of the envelope.

If it is not desired to remove the flap C by tearing along theperforated line 10, Figure 14 illustrates how this flap can overlie allof the other flaps and have its gummed portion 17 caused to adhere tothe adjacent portions of the other underlying flaps. When this takesplace, the

flap D''- has: its outer end: folded undenas: illustrated: in

Figure-7 soas-=to: cover the adhesive 211 and" expose; the: adhesiveportion 1 71 The postage stamp is placed on:

" tional flaps may be removed at will without damaging;

or in any. way affecting, the. usefulness: of; the. main body of. the.envelope; The directions: 34: and- 36. printed on these. addedbfiapsnearthe; edge 2, in Figure 19, would;v

alternate with; each. removable flap. and permit: the cardsbeingmailedback and-.forth. between two parties,.a.business firmand its steadyclient-.01 two; regular-social; correspondents. Theientireenvelopecould.be-mailed backand forth by using the flaps.

At: all points. where only a portion, of, an adhesive strip need be;used for: sealing-,- purposes, a transverse. per forated line;. suchas:the; line: 29a in Figure; 1-3, extendsv atright; anglesto the,perforated line 29: that bordersthe gummed; strip.- 28;. Figure 13'shows the portion E1 of the flap E1. overlying the folded? flap B. Theside flap G. overlies both: theflapsE: andB'and' since; flap E covers apart-.of flap B, it;is only necessary to use the part of the. gummed:strip 28: that. overlies the portion, E1. The remainder ofathe,gumrnedlstrip 28; is not used. In opening the seal, the tear. takes.place'along the transverse line. of-perforations29a andalong'theportionof the perforated line. 29 that lies. adjacent to the flap portion E1.The remaining portion of the perforated. line 29'need not be torn. Othertransverse tear lines are provided for a similar. purpose such as thetransverse. tear, line 24b disposediat right angles tothe tear line 24a,on the strip F, see Figure 1, and, the transverse tear line 18a disposedat right angles to the tear. line-18'on-the side flap'C, see thesamefigure.

The. various novelfeatures of the invention are not restrictedto,-special; sizesror shapes of envelopes. While preferred locations.and. shapes, of, these features are out.- lined in the specification,these may be altered or changed without departing from the novel phasesof the invention.

In certain cases it is desirable to provide two or more addresses withonly one address being exposed when the envelope is folded. The modifiedforms shown in Figures 21 to 27, inclusive, are designed for thispurpose. In Figure 21 I show a rotatable disc I or revolvableaddresslabel that has a central opening 43 therein for receiving a rivetor other pivotal support 44, see Figure 22, and this pivotal support ismounted in the strip F, see Figure 23, or at any other advantageouslocation. The disc I has two flattened edges 45 and 46, see Figure 21.Figure 23 illustrates how the disc may be rotated for positioning theedge 45 adjacent to the fold line 23 between the main panel A and thelong top fiap B. The other edge 46 will be received under the foldedflap E and will contact with the fold line 23 so as to prevent the discfrom rotating accidentally. The disc has the word From printed thereonin association with an arrow 47 and this arrow points to a name andaddress that may be printed on the fla B.

lifter the envelope has been opened and the one receiving it desires toreturn the envelope to the sender, the disc I is rotated through an arcof to bring the edge 46 into exposed position and to move the edge 45under the flap E, see Figure 24. The disc I has the word To printedthereon in association with an arrow 48 that points to a portion of theflap B on which the return address is printed. The directions 47 and 48on the address-label which reverse the destination of the envelope maybe used to eliminate the need of readdressing. The end view of theenvelope with the disc I is illustrated in Figure 22. The disc has aline of perforations 49, see Figure 21, paralleling the edge 45 and asecond line of perforations 50 paralleling the edge 46. The label hasgummed strips lying between the perforated lines and their adjacentedges 45 and 46 which permit the exposed portion of the label to beattached to the flap B for sealing the envelope. When the envelope isopened the label is torn along the exposed perforated line 49 and 50.The label has rectangular areas 51 for receiving postage stamps. A newlabel may be substituted for a used one as often as desired.

It is possible to provide a plurality of labels 1 as shown in Figures 25and 26, all of which are mounted on a pivot pin 43. The pin in turn hasan opening through which a connecting pin 44 is used for securing thelabel to the strip F. Each label in the stack shown in Figures 25 and 26is identical to that shown in Figures 21 to 24, inclusive, and thereforecorresponding reference numerals will be used. The only difference isthat the labels shown in Figures 25 and 26 have radially extending tearlines 52 for the purpose of tearing off a used label. This is clearlyshown in the two figures.

Another modification of the disc or label is shown at J1 in Figure 27.In this case four edges 53 are used in place of the two edges 45 and 46.The label may be swung into four different positions and lines ofperforations 54 permit the label to be torn open adjacent to theadhering gummed strip after each use. In all other respects this type oflabel is the same as that shown in Figure 21.

The interior side of the band H or the adjacent surface of the shortside flap G may carry a coating of dry adhesive which will act oncontact with a similar coating on the surface portion of the long sideflap C when the latter is folded and has its free end inserted into thesleeve formed by the band H and flap G. The long flap C when severedalong the line of perforations 10, can be slipped through the sleeve sothat its portion C2 is received therein and the flap can constitute aforwarding label.

The disc label J when used in a pack as illustrated in Figures 25 and26, may be folded along the perforated lines 45 and 46 so as not tointerfere with the adhesive portion of the label being used for securingthe label to the surface of the underlying flap.

I claim:

1. In an envelope blank: a main panel; a top fiap extending from the topof the panel and being foldable thereover; a bottom flap extending fromthe lower edge of the panel and being foldable over the top flap; thebottom flap being foldable along a median line in the flap thatparallels the fold line between the bottom fiap and the panel; whereby asection of the bottom flap may be folded under the remaining portion ofthe bottom flap and concealed when the folded bottom flap overlies thetop flap, and a strip secured to the bottom fiap and overlying themedian fold line; the strip having an exposed surface when the bottomflap is folded in half; the exposed surface having an adhesive thereonto permit the strip to be secured to the top flap when the bottom flapis folded over the top flap.

2. In an envelope blank: a main panel; a top flap foldable over thepanel; a bottom flap foldable over the top flap and covering a portionthereof; and a side flap foldable over the other two flaps and having astrip of adhesive overlying both the top and bottom flaps; said sidefiap having a line of perforations bordering the adhesive strip andhaving an additional short line of perforations extending across theadhesive strip at a point where the outer edge of the bottom flapoverlies the top flap; whereby only the portion of the adhesive stripoverlying the bottom flap may be caused to adhere to the bottom fiap andthe envelope can be opened by tearing along the short line ofperforations and along the portion of the first mentioned perforatedline that overlies the bottom flap.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 380,616 Bobrick Apr. 3, 1888 884,394 Keegan Apr. 14, 1908926,025 Shaffer June 22, 1909 945,710 Doxsee Jan. 4, 1910 965,269Yasmeta July 26, 1910 966,107 Lowe Aug. 2, 1910 1,040,004 Patton Oct. 1,1912 1,311,397 Herter July 29, 1919 1,344,071 Webster June 22, 19201,476,495 Cross Dec. 4, 1923 1,883,475 Bartsch Oct. 18, 1932 2,201,538Holden May 21, 1940 2,355,348 Welliver et al. Aug. 8, 1944 2,527,925Frampton Oct. 31, 1950 FOREIGN PATENTS Number Country Date 118,376 GreatBritain Aug. 29, 1918 120,003 Great Britain Oct. 24, 1918

